Finding the Third Proportional to 665,340 and 1,439,928

Step by Step Solution

1. Step 1: Write the proportion equation
   665,340 : 1,439,928 = 1,439,928 : x
2. Step 2: Convert to fraction form
   665,340/1,439,928 = 1,439,928/x
3. Step 3: Cross multiply
   665,340x = 1,439,928 × 1,439,928
4. Step 4: Simplify right side
   665,340x = 2,073,392,645,184
5. Step 5: Solve for x
   x = 2,073,392,645,184/665,340
6. Step 6: Final answer
   x = 3,116,290.39